Programming instructions

Appendix C: Glossary
93
curtain set point
Curtain set point is the target temperature for the curtains. When the
temperature is between the curtain set point and idle band limits, the
curtains hold their position.
Set point is one of six curtain settings. For more information, read
Programming relays for curtain control on page 53.
See also actuator set point and relay set point.
different method
(DIF)
DIF is a mode of temperature setback. During the setback time DIF
mode, OMNI-Select actively cools the area to try to lower the temperature
to the new set point.
For more information, read Programming the temperature setback on
page 39.
differential (for
actuators)
When the temperature reaches the differential temperature setting, the
actuator reaches its final position for the stage.
For more information, read Programming relays for actuator control on
page 49.
differential (for
variable stages)
For variable cooling stages, when the temperature is above the differential
temperature setting, the fan runs at full speed.
For variable heating stages, when the temperature is below the differential
temperature setting, the heater is at full output.
For more information, read Programming variable stages on page 46.
duty cycle
Duty cycle is a temperature-based method of controlling heating or
cooling elements using ‘on durations’ and ‘off durations’.
For cooling elements, when the temperature is below the set point, the
cooling element is off. When the temperature is above the set point, the
element switches on for the ‘on duration’ and then off for the ‘off
duration’.
For heating elements, when the temperature is above the set point, the
heating element is off. When the temperature is below the set point, the
element switches on for the ‘on duration’ and then off for the ‘off
duration’.
For more information, read Programming heating, cooling, and duty-
cycle relays on page 56.